24. Perl Options - Case Insensitive Matching

• In Perl, and in many other regex tools, you can do case insensitive matching. In Perl, it's done with the "/i" modifier:

    #!/usr/bin/perl
    $_ = "How about this for a target!";
    if (m/(THIS)/i) {
      print "$1\n";
    }
  

  gives:

    this